mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-08 21:28:45 +00:00
461fd8d82d
Don't leak the bus. Don't parse messages with the method for errors (triggers gobject warning).
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/* GStreamer typefind element example
|
|
* Copyright (C) <2005> Stefan Kost
|
|
* Copyright (C) <2006> Tim-Philipp Müller
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <gst/gst.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
static void
|
|
type_found (GstElement * typefind, guint probability, const GstCaps * caps,
|
|
gpointer user_data)
|
|
{
|
|
gchar *xml, *caps_str;
|
|
|
|
caps_str = gst_caps_to_string (caps);
|
|
xml = g_markup_printf_escaped ("<?xml version=\"1.0\"?>\n<Capabilities>\n"
|
|
" <Caps1>%s</Caps1>\n</Capabilities>", caps_str);
|
|
g_free (caps_str);
|
|
|
|
g_print ("%s\n", xml);
|
|
g_free (xml);
|
|
}
|
|
|
|
static void
|
|
event_loop (GstElement * pipe)
|
|
{
|
|
GstBus *bus;
|
|
GstMessage *message = NULL;
|
|
gboolean running = TRUE;
|
|
|
|
bus = gst_element_get_bus (GST_ELEMENT (pipe));
|
|
|
|
while (running) {
|
|
message = gst_bus_poll (bus, GST_MESSAGE_ANY, -1);
|
|
|
|
g_assert (message != NULL);
|
|
|
|
switch (message->type) {
|
|
case GST_MESSAGE_EOS:
|
|
running = FALSE;
|
|
break;
|
|
case GST_MESSAGE_WARNING:{
|
|
GError *gerror;
|
|
gchar *debug;
|
|
|
|
gst_message_parse_warning (message, &gerror, &debug);
|
|
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
|
|
g_error_free (gerror);
|
|
g_free (debug);
|
|
break;
|
|
}
|
|
case GST_MESSAGE_ERROR:{
|
|
GError *gerror;
|
|
gchar *debug;
|
|
|
|
gst_message_parse_error (message, &gerror, &debug);
|
|
gst_object_default_error (GST_MESSAGE_SRC (message), gerror, debug);
|
|
g_error_free (gerror);
|
|
g_free (debug);
|
|
running = FALSE;
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
gst_message_unref (message);
|
|
}
|
|
gst_object_unref (bus);
|
|
}
|
|
|
|
int
|
|
main (int argc, char *argv[])
|
|
{
|
|
GstElement *pipeline, *filesrc, *typefind, *sink;
|
|
|
|
gst_init (&argc, &argv);
|
|
|
|
if (argc != 2) {
|
|
g_print ("usage: %s <filename>\n", argv[0]);
|
|
exit (-1);
|
|
}
|
|
|
|
/* create a new pipeline to hold the elements */
|
|
pipeline = gst_pipeline_new ("pipeline");
|
|
g_assert (pipeline != NULL);
|
|
|
|
/* create a file reader */
|
|
filesrc = gst_element_factory_make ("filesrc", "file_source");
|
|
g_assert (filesrc != NULL);
|
|
g_object_set (G_OBJECT (filesrc), "location", argv[1], NULL);
|
|
|
|
typefind = gst_element_factory_make ("typefind", "typefind");
|
|
g_assert (typefind != NULL);
|
|
|
|
sink = gst_element_factory_make ("fakesink", "sink");
|
|
g_assert (sink != NULL);
|
|
|
|
/* add objects to the main pipeline */
|
|
gst_bin_add (GST_BIN (pipeline), filesrc);
|
|
gst_bin_add (GST_BIN (pipeline), typefind);
|
|
gst_bin_add (GST_BIN (pipeline), sink);
|
|
|
|
g_signal_connect (G_OBJECT (typefind), "have-type",
|
|
G_CALLBACK (type_found), NULL);
|
|
|
|
gst_element_link_many (filesrc, typefind, sink, NULL);
|
|
|
|
/* start playing */
|
|
gst_element_set_state (pipeline, GST_STATE_PLAYING);
|
|
|
|
/* Run event loop listening for bus messages until EOS or ERROR */
|
|
event_loop (pipeline);
|
|
|
|
/* stop the bin */
|
|
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
gst_object_unref (pipeline);
|
|
|
|
exit (0);
|
|
}
|